[Collins] KWM-2A help (long)

[Dr. Gerald N. Johnson]

The audio tone oscillator has a tendency to a VHF parasitic. There's a 
service bulletin about that probably inserting a 56 or 100 ohm resistor 
in series with the control grid. SB-10 and its 47 ohms between the 
screen and the screen bypass.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 9/19/2010 5:04 PM, Glen Zook wrote:
> The 6EA8 usually works fine as a replacement for the 6U8/6U8A EXCEPT for the tone oscillator.  For some reason, the 6EA8 usually fails miserably when used in the tone oscillator circuit.  This is true of the 32S- series transmitters as well.
>
> Glen, K9STH
>
> Website:  http://k9sth.com
>
>